Calibration failure

Calibration results:

CH1 offset at 5V/div : 161 OK
CH1 offset at 1V/div : 201 FAIL
CH1 Y-position low 0
CH1 Y-position mid 0
CH1 Y-position high 0

i dont know whats to do can someone helps me ?

Please check the voltage over the zener diode ZD1.
There should be about 5V.
Check also IC1 is in right position.

For more details please see:

hi i have checkt the voltage it is 5.15 V and ic1 is in the right position
ps. thanks for your quick response :slight_smile: